Transfer credits between accounts.
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From Main account to Sub account.
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From Sub account to Main account.
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From Sub account to another Sub account.
Your WinSMS account number and sub account number/s can be obtained by logging in to the WinSMS Client Zone () with the main account's credentials.
The main account number is on the home tab and the sub account numbers are under the sub accounts tab.
Account numbers should be submitted as integers. Do not add the 'W' prefix.